The Miami Dolphins have placed two of the team's projected offensive starters on the Physically Unable to Perform list.

Dolphins center Mike Pouncey and newly acquired tailback Knowshon Moreno will begin training camp, if not the 2014 NFL season on the PUP list. They will not be allowed to participate in practices or games until they are cleared medically by team doctors.

However, they can participate in rehab assignments with the team in Davie. ...

Players placed on the PUP list can come off at any point before the 53-man roster is create the week before the season opener. However, if a player remains on the PUP list during the regular season he can't come off until week six of the NFL season. ...

If a player started on the Active/PUP list and isn't medically cleared by the end of the preseason, an NFL team may transfer them to the Active/PUP player to the Reserve/PUP.

These players are prevented from playing and practicing during the first six weeks of the season. What makes the Reserve PUP advantageous is that any player on the Reserve PUP list does not count against the 53-man roster. If a player isn't activated after the sixth week, the team has a three-week window to place him on injured reserve, release the player, or get him cleared to practice and play ...